Mars

Some basic facts:

radius ~ 0.5 R_Earth
distance from sun ~ 1.5 AU.
cold to cool: 133 K to 293 K.
Mars has two small moons.
How about its motion ?
How about its interior ?
How about its atmosphere like?
Is there life on Mars?
What does its surface look like?

Davison E. Soper, Institute of Theoretical Science, University of Oregon, Eugene OR 97403 USA soper@bovine.uoregon.edu